Manufacture of crinkled paper and the like



Nov. 5, 1935.

R. HEITMANN MANUFACTURE OF -CRINKLED PAPER AND THE LIKE Filed June l2, 1954 2 Sheets-Sheet l 1 l i f i "i im* f' i a 3 l l i k i 5 l i i i' 6 g' l 5 i r@ I i f l l e E ,1' z .Z0 9 l' f I l /l l l I I "f/ J F- "if i I/ k Rudolf )(eimann Nov. 5, 1935. R. HEITMANN 2,019,903

MANUFCTURE OF CINK-LED PAPER AND THE LIKE Filed June l2, 1954 2 Sheets-Sheet 2 fn zf @n for Ruda/f /Veizmann Patented Nov. 5, '1935 UNITED STATES MANUFACTURE F CRINKLED PAPER AND THE LIKE Rudolf Heitmann, Mannheim, Germany Application June 12, 1934, Serial No. 730,224

Germany June 24, 1933 6 Claims.

This invention relates to an improved method and means for crinkling paper, leather or imitations of leather or like material which is made in lengths or webs and may be also manufactured from vegetable or animal fibres or even from artificial fibres and its object is more particularly to provide an improved and eiective method of crinkling such materials in two directions at right angles or substantially at right angles to one another. Thus it is sought to produce a material of paper or the like in lengths or webs and having crinkling arranged in longitudinal and transverse folds.

The methods of producing such products as hitherto proposed have been diiicult to carry out in practice and the resulting product is not adequately elastic in its production is costly. As an example it has been proposed to form crinkles arranged transversely to the length of the web material by drawing the material between profiled surfaces. It has also been proposed to employ rubber bands for this purpose, the band being stretched and then a1- lowed to contract to apply the desired crinkles.

According to this invention the longitudinally running folds of the crinkles are produced, either in a plain web or in a web which has a1- ready been formed with transverse crinkles, by passing the web for part of its length into a slot or channel, the width of which is not materially different from the width of the web, thereupon whilst the web is stationary the width of the slot or channel is reduced, whereby the desired crinkling, which may be superposed on the already existing transverse crinkling, is obtained. Thereafter the web is released by restoring the slot or channel to its original width ready to receive a fresh stretch of web on which the operation may be repeated.

The accompanying drawings illustrate diagrammatically the kind of dies which may be provided to eifect the crinkling in accordance with this invention. The mechanism for operating the dies has been omitted and may be of any desired form.

In these drawings:

Figures 13 show respectively a transversely crinkled, a longitudinally crinkled and a cross crinkled stretch of web.

Figure 4 is a cross section of the die in the widened state ready to start the longitudinal crinkling operation on the'web stretch which has been moved therein.

Figure 5 is a section of the die after the parts properties, whilst its' thereof have been moved to effect the crinkling,

Figure 6 is a plan view of the dies.

Figure 7 is an axial section and Figure 8 an end view of a modified form of crinkling die in accordance with this invention. 5

Figure 9 is a. view similar to Figure 8 but showing the die parts in their relative positions when the crinkling operation has been completed.

Figure 10 is a plan view showing a development 10 of the operative edge on one of the die parts of Figures 8 9.

In carrying out the process of crinkling it is of importance that many irregular folds should be formed in the material and that these folds should in no case exceed a certain predetermined height. According to the form shown in Figures 4 6 this predetermined height is fixed by the slot or channel formed by the two die plates 3 and each of which has a knee bend 20 forming the side walls 5 and li of the die. Into the die slot there is passed a. stretch of web which may have the transverse crinkles already formed thereon, and by pressing the die parts 3 and 4 towards one another, the web section 8 25 shown in Figure 5 results having longitudinal crinkles formed therein which crinkles cannot in any case exceed in height the height of the slot between the broad die faces 3 and ll. The side walls of the die are widened to form a gate entrance as indicated at 9, lil in Figure 6 to the actual crinkling part 5, t of the dies. At the next operation of the dies this tapered part of the web is treated within the part 8 of the dies.

In the form shown in Figures 7-10 the crin- 35 kling slot or channel is formed between two concentrically arranged cylindrical parts l l and l2 which also have side pressing walls I3 and I4. The inner and outer cylindrical parts each have `widened sections of slot or channel, as indicated by the outline I5 in the development of Figure 10. The outer cylindrical part has in addition an opening i6 for theintroduction and withdrawal of the web which follows the path indicated by dotted lines in Figure 8. The development of the side wall of the outer cylindrical die part is shown in Figure l0 where the crinkling pressure face is indicated by the reference t3 and the tapered gate portion of the die wall ls indicated by the reference l5.

The means for advancing and receding the die parts to and from one another may be of any desired kind and the die parts may be suitably guided in a manner which will be very evident to those engaged in this art. In order to facilitate the introduction of the web into the dies or slot portion the die parts I and I oi.' Figures 4-6 may beraisedandinthecaseotthetormshownin Figures 'I-10 the hollow cylindrical part I l may be formed ot a plurality of radially movable sectors. Suitable means such as that used for tightening collets may be used for expanding and contracting the sectors or segments of the hollow cylindrical die.

It will be evident that the invention may be employed for imparting longitudinal crinklings either to a plain web or to a web which has already been provided with transverse crinkles.

What I claim is:

1. Mechanism for producing crinkled webs and the like material comprising two oppom die plates each of which has a knee bend forming the side walls of the dies and means for moving the plates laterally towards each other.

2. Mechanism for producing crinkled webs and the like material comprising two opposed die plates each o! which has a knee bend forming the side walls of the dies, such side walls being widened to form a gate entrance for the web andmeans for moving the plates laterally towards each other.

3. Mechanism for producing crinkled webs and the like material comprising two opposed die plates each of which has a knee bend forming thesidewsllsofthedlesandmeansformoviug the plates in a direction perpendicularl to the vertical portions oi the die plates.

4. Mechanism tor producing crinkled webs and thelikematerialcomprisingtwoopposeddie I plates each of which has a knee bend forming thesidewallsotthedies,suchsidewalisbeing widened to form a gate entrance for the web and means tor moving the plates in a direction perpendicular to the vertical portions of the die 10 D tes.

5. Mechanism i'or producing crinkled webs and the like material comprising two concentrically arranged cylindrical dies having side pressing walls. the outer die part having an opening for ll introduction and withdrawal of the web to be operated upon and means for axially moving the dies.

6. Mechanism for producing crinkled webs and the like material comprising two concentrically N arranged cylindrical dies having side pressing walls, the outer and inner die part having tapered gate portions extending from the said pressing walls, and the outer die part having an opening for the introduction and withdrawal of the web I and means for moving the die parts axially towards and from one another.

, RUDOLF HEITMANN. 

